Null flux were suggested by Danby and Powell in the late 1960's as a useful means for realizing induced lift with little drag. As an array of alternating magnets is translated past a set of null flux coils, the currents induced in these coils act to vertically center the magnets on those coils. At present, one Japanese MAGLEV system company and two American-based companies are employing either null flux or flux eliminating coils in their design for high speed magnetically levitated transportation. The principle question addressed in paper is: what is the proper choice of coil length to magnet length in a null flux system? A generic analysis in the time and frequency domain is laid out with the intent of showing the optimal design specification in terms of coil parameters.
Designing with null flux coils
IEEE Transactions on Magnetics ; 33 , 5, pt.3 ; 4327-4334
1997
8 Seiten, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
Calculation of motion induced eddy current forces in null flux coils
Tema Archiv | 1995
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